Jewel-setter.



" No. 74 ,444. PATENTED DEC. s; 1903.

W. F. BOAST.

JEWEL SETTER.

APPLICATION FILED APR. 1, 1903.

N0 MODEL.

WITNESSES: INVENTOH WZ/Zzavzflz derlrkfiflaJf W By W I I I ATTORNEYS,

THE NORRIS PETERS '00, mo'mumu WASHINGTON n. cy

Patented December 8, 1903.

PATENT OFFICE.

WILLIAM FREDERICK BOAST, OE COLBY, KANSAS.

JEWEL-SETTER.

SPECIFICATION forming part of Letters Patent No. 746,444, dated December 8, 1903.

Application filed April 1, I903. Serial lilo. 150,555. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM FREDERICK BOAST, a citizen of the United States, and a resident of Colby, in the county of Thomas and State of Kansas, have invented a new and Improved J ewel-Setter, of which the fol- I lowing is a full, clear, and exact description.

The i nvention relates to watchmakers tools; and its object is to provide a new and improved jewel-setter which is simple and durable in construction, very efiective in operation, and arranged to permit a jeweler to accurately and quickly set the roller-jewel in correct position in the roller table of the watch-balance.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a plan view of the improvement, showing the balance-wheel in position. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged plan View of the improvement, and Fig. 4 is an enlarged side elevation of the same.

The body-plate A of the jewel-setter is provided at one end witha suitable handle B, adapted to be taken hold of by the jeweler for conveniently holding the tool, and on the said body-plate are arranged legs 0 for supporting the plate a suitable distance over the work-table. In the front side of the bodyplate A is arranged a vertically-disposed V- shaped groove A for the reception of the roller-jewel, held in place in the said groove by a fiat spring D, secured at one end by a screw E or other means to the front edge of the body-plate A. The spring D is adapted to be opened by a cam F, having its shaft F journaled in suitable bearings on the plate A, and on the shaft F is secured a handle F under the control of the jeweler to turn the shaft and the cam F so as to engage the peripheral face of the cam with the inner face of the spring D to swing the latter outward to permit of conveniently placing the rollerjewel in the groove A. When this has been done, then the handle F is turned to bring the flat portion ofthe cam F opposite the inner face of the spr ngD to allow the latter to close by its own resiliency, thereby engaging the free end of the spring with the rollerjewel.

In the body-plate A is arranged an elongated aperture A in transverse alinement with the groove A and adapted to receive the stafi of the balance-wheel, as indicated in dotted lines in Fig. 3. On opposite sides of this aperture A are arranged clampingarms G and G for engaging opposite sides of the roller-table of the watch-balance, and the inner edges of the said clampingarms G and G are beveled to draw the roller-table firmly down onto the top face of the bodyplate A, so that the roller-table is in proper position for receiving the roller-jewel held in the vertical groove A. The clamping-arms G and G are fu'lcrnmed at G and G on the top plate A, and the fulcrum ends of the said clam pin g-arms are connected with each other by gear-teeth G G to cause the clam ping-arms G and G to move in unison. .The clampingarm G is provided with a handle G under the control of the jeweler, to open and close the clamping-arms to disengage or engage the roller-table of the watch-balance. The f u lcrum ends of the clamping-arms G and G are pressed on by the free ends of flat springs H and H, secured to .the rear side of the body-plate A, and the said springs serve to press the clampingarms G and G in contact with the roller-table, so as to hold the same in position. The fulcrum end of the clamping-arm G is provided with a fiat face G", engaged by the spring H at the time the clamping-arms G and G are in an open position, as shown in Fig. 3, so that the clampingarms are held in this open position. When the jeweler swings the arm G forward, then the clamping-arms G and G move into a closed position and the flat face G moves out of engagement with the spring H, so that the springs H and H finally press the fulcrum ends of the clamping-arms G and G to swing the latter toward each other, and thereby in firm engagement with the roller-table. Now by the arrangement described the jeweler is enabled to conveniently insert the as new and desire to secure by Letters Patent 1. A jewel-setter comprising a handled body, a plate formed in one side edge with a vertical groove, for the reception of the jewel, a spring on the said side edge, extending across the groove, to engage and hold the roller-jewel in place, and a pair of coacting spring-pressed clamping-arms on the top of the body-plate, for engaging the roller-table at opposite sides, as set forth.

2. A jewel-setter comprising a handled body, a plate formed in one side edge with a vertical groove, for the reception of the jewel, a spring on the said side edge, extending across the groove, to engage and hold the roller-jewel in place, and a pair of coacting spring-pressed clamping-arms on the top of the body-plate, for engaging the roller-table at opposite sides, the inner edges of the said,

clampingarms being beveled, as set forth.

3. A jewel-setter having a plate, formed with an aperture, for the reception of the balance-statf, a pair of spring-pressed clampingarms, fulcrumed on the said plate and extending on opposite sides of the aperture, to engage the roller-table from opposite sides and means for holding the jewel in position, as set forth.

4. A jewel-setter having a plate provided with means for receiving and holding a jewel, the said plate being formed with an aperture, for the reception of a balance-stafi, and a pair of spring-pressed clam ping-arms, fulcrumed on the said plate and extending on opposite sides of the aperture, to engage the roller-table from opposite sides, the inner edges of the said clamping-arms being beveled, to draw the roller-table down onto the top of the said plate, as set forth.

5. A jewel-setter having a plate, formed with an aperture, for the reception of a balance-staff, a pair of spring-pressed clampingarms, fulcrumed on the said. plate and extending on opposite sides of the aperture, to

engage the roller-table from opposite sides,

the clamping-arms being pivoted on the top of the plate, means connecting the clampingarms with each other, to move the clampingarms in unison, the said plate being provided with a groove for the reception of the jewel, and means for holding the jewel in place in the groove, as set forth.

6. A jewel-setter having a plate, formed with an aperture, for the reception of a balance-staff, a pair of spring-pressed clampingarms, fulcrumed on the said plate and extending on opposite sides of the aperture, to engage the roller-table from opposite sides, the clamping-arms being pivoted on the top of the plate, means connecting the clampingarms with each other, to move the clampingarms in unison, one of the clamping-arms having a handle, under the control of the jeweler and means for holding the jewel in position, as set forth.

7. A jewel-setter,comprisingaplate formed in one side edge with a groove for the reception of the jewel, a spring on the said side edge extending across the groove, to hold the jewel in position, a cam for moving the spring outward to permit of conveniently placing the jewel in the groove,the plate being formed with an aperture for the reception of the balance-staif, a clamping device on the plate for .holding the roller-table in position to receive the jewel, a handle at one end of the plate, and legs arranged on the plate for supporting the latter a suitable distance over the work-table, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM FREDERICK BOAST.

Witnesses:

J. B. HAMPTON, S. W. NIooL. 

